解决方案：An error was encountered while running(Domain=FBSOpenApplicationErrorDomain, Code=4)

iOS simulator出现问题，提示：

 

An error was encountered while running (Domain = FBSOpenApplicationErrorDomain, Code = 4)

 

解决方案：

 

[iOS Simulator] >>> [Rest Contents and Settings...] >>> [Reset]

参考：解决问题